<?php    
 
    include "./phpqrcode.php";   
    $value=$_GET['url'];  
    $errorCorrectionLevel = "L"; // 纠错级别：L、M、Q、H  
    $matrixPointSize = "4"; // 点的大小：1到10  
    QRcode::png($value, false, $errorCorrectionLevel, $matrixPointSize);  